East Nishnabotna River IA 05-NSH-1415
from confluence with Fisher Cr. (S27 T69N R40W Fremont Co.) to Page/Montgomery county line
Assessment Comments
Assessment is based on results from the DNR monthly water quality monitoring station at Hwy 59 near Shenandoah.
Basis for Assessment
No violations of Class B(WW) WQC during biennial period; thus, should assess as FST due to known threats due to agricultural NPS. Rivers in this region, however, are impaired by stream channelization, removal of riparian vegetation (especially trees), streambank destabilization, and by agricultural development. These impairments cause habitat alterations (i.e., loss of amount and quality of habitat due to siltation, stream widening, and unfavorable flow regimes in wide, silt/sand channels.) Thus, assess this reach as PS its aquatic life uses.
Assessment Key Dates
Methods
230 | Fixed station physical/chemical (conventional plus toxic pollutants) |
Monitoring Levels
Biological | 0 |
Habitat | 0 |
Physical Chemistry | 3 |
Toxic | 0 |
Pathogen Indicators | 0 |
Other Health Indicators | 0 |
Other Aquatic Life Indicators | 0 |
# of Bio Sites | 0 |
BioIntegrity | N/A |